Serial Communications
8-11
SLC Image Table Map
①
Set SW2, Switches 1 and 2 to “On.”
Switch Settings
Software Configuration Settings
RIO Configuration Using G Files – The block transfer operation
requires that the G File of the 1747-SN scanner module be
configured. The scanner’s G File settings are based on the devices that
you have on the RIO link. It consists of setting logical device starting
addresses and the logical device image size of each physical device/
adapter with which the scanner communicates.
The G File is configured as part of the I/O configuration procedure for
the processor file. You edit the data offline under the I/O
configuration menu only. After the 1747-SN specialty I/O module is
assigned to a slot, access the SPIO CONFIG [F9] menu instruction in
the Advanced Programming Software (APS). The configuration
settings are set as follows:
1. [F5], ADVNCD SETUP
to specify input size, output size,
scanned input, scanned output, M0 and M1 file sizes.
This SMC Dialog application example utilizes the following
settings:
Maximum Input Words: 32 (fixed, cannot modify)
Maximum Output Words: 32 (fixed, cannot modify)
Scanned Input Words: 32 (default value
①
)
Scanned Output Words: 32 (default value
①
)
M0 Length: 3300 (size is set for block transfer operation)
M1 Length: 3300 (size is set for block transfer operation)
①
Setting the scanned input and scanned output words to less than 32 can reduce the processor scan
time by transferring only part of the input and output image that your application requires. It is
important that you do not set either of these values to 0.
SLC Word Output Image Input Image Rack Size Start at Group
0 Block Transfer Block Transfer 1/4
0
①
1 Logic Command Logic Status
SW2
8 7 6 5 4 3 2 1
Starting Module Group (0)
Starting Module Group (0)
Last Rack Setting (On)
Hold Last State (On)
Fault on Comm Loss (On)
Fault Controller (On)
RIO Baud Rate (57 K)
RIO Baud Rate (57 K)
SW1
8 7 6 5 4 3 2 1
Not Used
Not Used
On
On
On
On
On
On
SW3
8 7 6 5 4 3 2 1
Block Transfer On
Logic Cmd/Sts On
Reference/Fdbk Off
Datalink A Off
Datalink B Off
Datalink C Off
Datalink D Off
Truncate Last Datalink Off
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